USN-5474-2 (UBUNTU-CVE-2020-11653)

Vulnerability from osv_ubuntu – Published: 2022-08-23 19:00 – Updated: 2026-04-22 07:37 – Source website
VLAI
Summary
varnish regression
Details

USN-5474-1 fixed vulnerabilities in Varnish Cache. Unfortunately the fix for CVE-2020-11653 was incomplete. This update fixes the problem.

Original advisory details:

It was discovered that Varnish Cache could have an assertion failure when a TLS termination proxy uses PROXY version 2. A remote attacker could possibly use this issue to restart the daemon and cause a performance loss. (CVE-2020-11653)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-11653",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libvarnishapi2",
            "binary_version": "6.2.1-2ubuntu0.2"
          },
          {
            "binary_name": "varnish",
            "binary_version": "6.2.1-2ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "varnish",
        "purl": "pkg:deb/ubuntu/varnish@6.2.1-2ubuntu0.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.2.1-2ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.1-1",
        "6.2.1-2",
        "6.2.1-2ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-5474-1 fixed vulnerabilities in Varnish Cache. Unfortunately the fix for\nCVE-2020-11653 was incomplete. This update fixes the problem.\n\nOriginal advisory details:\n\n It was discovered that Varnish Cache could have an assertion failure when a\n TLS termination proxy uses PROXY version 2. A remote attacker could possibly\n use this issue to restart the daemon and cause a performance loss.\n (CVE-2020-11653)\n",
  "id": "USN-5474-2",
  "modified": "2026-04-22T07:37:02Z",
  "published": "2022-08-23T19:00:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5474-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-11653"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "varnish regression",
  "upstream": [
    "UBUNTU-CVE-2020-11653"
  ]
}



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